Boiler-riveting machine.



.W. B, THOMPSON. BOILER RIVETING MACHINE. APPLICATION FILED JAN. 30. 1318.

1,296,139.; Patented Mar. 4,1919.

WILLIAM BRUCE rHoMrson, or THORNBANK, DUNDEE, sco'rLAnD.

. nomnn -nivnrme MACHINE.

TQ all whom it may] concern:

THoMrsoN, a citizen of Great Britain resid; ing at Tho-rnbank, Dundee, in the county of Forfar, Scotland, have invented new and useful Improvementsin Boiler-Riveting lVlachines, of which the following is a specification. y p i This invention relates toa hydraulic ma chine for riveting boilers and has forits object to provide a machine for IlVBlll Ilg' parts of boilers which are usually riveted by hand. For instance, single ended marine front plates are usually riveted'by hand, vbecause there is not suflicient room between the front ends of the furnaces and the front plate to allow of this plate being riveted by power.

With the presentj invention such inacces sible parts can be riveted by power very successfully. i A

The following description and accompanying drawings show, a manner. of carrying out the invention. S

Referringto the drawings: a 1

Figure 1 is a side elevation of a machine.

Fig. 2 is a plan of'Fig.*1.

Fig. 3 is an end elevation of Fig. 1.

Fig. 4; is an enlarged vertical section on the center line of the riveting head.

The riveting head 1 is secured to a bed 2, to the other end of which bed is bolted a holder up device 3. A portion of a suspended boiler a in the process of having a rivet 6 put in, is shown in dot dash lines in Fig. 1, a portion of the holder up device protruding through the hole 0 of the boiler.

. The riveting head consists of a hollow cylinder 1 within which is located the main ram 5 provided with a chuck 6 which carries the steel tup 9, having a partly spherical recess 10 for forming the head of the rivet. The ram is provided with a packing ring 8 which secures in placea leather 11 for the purpose of making a joint between the ram and the cylinder. An inlet and outlet vent 12 is provided which can ad mit water to, and release it from, the rear of the ram 5.

Secured to the rear of the 'main ram is a second ram 13 which extends through a bore in the rear of the cylinder 1 into a chamber 14 located at, and secured to the rear end of the cylinder 4. The chamber is of greater diameter than that of the bore. This second Specification of Letters Patent.

"Patented lV[a1. 4:, 1919.

U Application filed Januar so, 1918. Seria1No.214,444. r

. 3 1 ram is provided with a pistonhead 15 car- Be it known" that I, WILLIAM BRUCE- rying a cup brass'16, for the purpose of .making a joint between theram and the brass liner comprising sections 18 and 22 is inserted between the bore and the ram 13,

. such sections being spaced apart and having theirinner ends provided with leather cups 19 and 21 respectively, between which is interposed a distance piece 20 for securing the cups in place to prevent water leaking from the cylinder 1 to thechamber' 14:, or

vice versa. The sections of. the liner are prevented from endwisemovement by the V end of one abutting against the head 23 of 1 the ram 13 and the end ofthe other abutting against the piston head. A vent24 permits access of water to the chamber-14;, this ventlbeingalways open and the water always under pressure. I i 1 I The base 2 is built up. of H section girders and is provided with slotted holes 25. to allow the holder up device to be secured nearer or farther away from the riveting head as desired, according to the distance the hole cis from "the point to be riveted.

The holder up device consists of a base 26 secured by bolts 27 to the main base 2. A perpendicular pillar 28 has keyed to it, by a key 29 a holder up arm. This arm is divided longitudinally of its length, so that each part may be put through the hole 0 separately and afterward united by bolts 30. The arm is composed of sections, 31, 32, 33 and 34; respectively, each section being connected by bolts to the next. The end section 34 carries a tup 35 which presses against the head of the rivet. The pillar 28 is bored out at 36 for the purpose of admitting an air compressor tube to the interior of the boiler, to operate a calking or other pneumatic tool when it 'is required for work inside the boiler, an inlet 37 being provided so that the tube may pass into the bore 36. Passing the compressor tube through the center of the pillar 28, permits the pneumatic tool to be used when the boiler is turned around without winding up the tube, as would be the case if the tube entered through the manhole at the side.

In operation, the boiler a is lowered so that the pillar 28 passes through the hole 0; it can thus be turned about the pillar as required for riveting. The two halves of the holder up arm are then secured in position on the pillar 28, the key 29 securing the arm to the pillar, the sections 32 and 33 having been previously put in or taken out according to the distance the seam to be riveted is from the hole 0 and the holder up device secured in the proper position on the bed 2. Wh'en'everything is ready for the riveting to begin water .is admitte'diat the vent 12 t0 the rear of the ram 5, which ram is thereby forced forward, the tup9 effectingthe necessary work on therivet I): later under pressure is also admitted at the vent 24,: but this vent is always open and the water under 'pressure 1s always working against the piston 15 and therefore continually tendingto draw back the ram 5.

Owing, however, to thearea of the head of 1 the ram being greater than the area of the piston, the ram is forced forward when the riveting head, a holder up device, a pillar forming part of said device, a holder up arm divided longitudinally and mounted on sald' pillar, and a base carrying said riveting head and said holder up .devlce.

2; A boilerf riveting-machine comprising a V riveting head, a vpillar formingpart of said a ing saidriveting head and said holder up device.

3. A boiler riveting machine compris ng a riveting head, a holder up device, a pillar forining part of said-device, a holder up arm detachably mounted on saidpillar and divided longltudinall y andbuilt-upof inde-- pendent sections, a tup en said end section, and a base carrying sa1d riveting head and said holderup device. y t.- -A boiler "riveting machine comprising a rlvetlng head,- a holder up device, a pillar forming partofsaid holderupde'vice, a

holder up arm detachably mounted on said pillar divided a longitudinally" and built up of independent sections and mounted on saidpilla'r,'a hollow bore in said-pillar, base carrying said riveting head said holder up device, and slotted holes in said base for the purpose of adjusting the holder 1 up device to the length of the holder up arm when sections are taken out of said 'arnr or 1nserted.

1 'In testimony whereof I havesignedmy name to this specification in the presence of two subscribing witnesses V i WILLIAM, acon T o Ps'o'N; Witnesses: 1 it i" AGNES CULBARD DOUGLAS,

THEODORE WILLIAM DOUBBLE. I 2

Copies of this patent may be obtained for five cents-1 each, by addressing the ifi' om missioner of Patents,

Washington, D. C. l 

